Gas leak
 

Hi guys I have a 2003 Nissan 350z I bought 3 days ago I been noticing a strong smell of gasoline and a drop of gas mileage on my car I started looking into it and saw that the gas was coming from where the fuel pump is ( on passenger side behind seat) I thought maybe it would be the o ring so I replace that and the car is still leaking gas 😭 help please!

Welcome- this isn't a common problem with the Z33. This is not a problem that we have any insight on from behind a keyboard. Take it to a ASE mechanic or Nissan trained tech to determine how to repair this leak.